JPH01187134A - Image forming device - Google Patents

Abstract

PURPOSE:To facilitate image formation from small to large size by feeding a large-sized web stored in a machine body to an image forming part, and providing the machine with a cassette storing small-sized sheets. CONSTITUTION:There is provided with sheet storing units 3, 5 storing small-sized sheets in a machine body of a image forming device 1. A large sized-web W is stored in the machine body 2, and web feeding means 7, 9 are arranged so as to feed the web to an image forming part 11. In forming small-sized image, small-sized sheet is fed to the image forming part 11 from the sheet storing units 3, 5 and then image is formed thereat. In forming large-sized image, the web W is fed to the image forming part 11 from the web feeding means 7, 9 and image is formed thereat. It is thus possible to perform image formation from small size to large size.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to an image forming apparatus such as a copying machine, a printing machine, or a laser beam printer. The present invention relates to an image forming apparatus that accommodates two nibs.

(b) Conventional technology In general, most image forming apparatuses are equipped with a sheet storage device (hereinafter referred to as a cassette) for up to three sizes of sheets, and large sizes of A3 or larger (for example, AI,
When forming an image of A2 size, etc., a large-sized image forming apparatus equipped with a large-sized web was used.

(c) Problems to be Solved by the Invention By the way, since the above-mentioned image forming apparatus equipped with a cassette of up to A3 size can only form images on A3 size sheets, image formation that can form images from small sizes to large sizes is possible. The device was in demand. In addition, in the case of a large-sized image forming apparatus equipped with the above-mentioned large-sized web, small-sized images must be cut off after the image is formed on the web, which is time-consuming and troublesome, and also requires manual feeding. When forming images, it was not possible to form a large amount of images.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an image forming apparatus that is equipped with a cassette that accommodates both large-sized webs and small-sized sheets, thereby easily forming images from small to large sizes. The purpose is to

- Means for Solving the Problems The present invention has been made in view of the above-mentioned circumstances. For example, as shown in FIG.
An image forming apparatus (1) comprising a sheet storage device (3°5) for storing a large-sized web (W) is configured to store a large-sized web (W) in the body (2).
) to the image forming section (11).

(E) Function When forming a small-sized image based on the above-described configuration, the sheet (S) is fed from the sheet storage device (3, 5) to the image forming section (11), and the sheet (S) is Image forming section (
11) to form an image. In addition, when forming a large-sized image, the web (W) is transported by the web feeding means (7).
, 9) toward the image forming section (11), and the image forming section (11) forms an image on the web (W).

Note that the above-mentioned symbols are shown for reference and do not limit the configuration in any way.

(F) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the laser beam printer 1 has cassettes 3 and 5 that can be detachably attached to a body 2 and store sheets therein. A door 6 that can be opened and closed is provided on the side of the machine body 2 below the cassette 5.
There is a large width inside the fuselage 2 on the back side (for example, an Al size convergence).
The web W of is stored. Further, a pair of paper feed rollers 7 for feeding the web W is disposed close to the nib W, and a web cutter (not shown) is disposed downstream of the pair of paper feed rollers 7. Further, a pair of conveying rollers 9 is disposed downstream of the web cutter.
And downstream of the cassettes 3 and 5, there is a pair of registration rulers.
o is arranged.

An image forming section 11 is disposed downstream of the pair of registration rollers 10, and the image forming section 11 transmits a laser signal from a laser emitting section (not shown) via a polygon mirror 12 and a mirror 13. It is now possible to do so. Further, a fixing device 15 is arranged downstream of the image forming section 11, and a paper output tray 1 is arranged downstream of the fixing device 15.
A pair of paper ejection rollers 17 for ejecting the sheet to the paper sheet 6 is disposed.

Since the present embodiment has the above-described configuration, when the laser beam printer 1 obtains image information from an external device, the image information is emitted from a laser emitting unit (not shown).
The light is secondly reflected by the polygon mirror 12 and the mirror 13 and exposed to the image forming section 11, and the image forming section 11 forms an image by exposure. At this time, if the line image is small, a sheet of small size (for example, A3 or B4) is fed from the cassette 3 or 5, and is conveyed by the pair of registration rollers 10 in synchronization with the image on the image forming section 11. Then, an image is printed on the sheet by the image forming section 11, and the sheet is further conveyed to the fixing device 12. Then, the sheet has a certain value, 1
The image is fixed by the roller 12, and the paper is discharged to the paper discharge tray 16 by a pair of paper discharge rollers 17. On the other hand, the image formed on the image forming section 11 is larger than A3 size (for example, AI,
A2, etc.), the web W is fed by a paper feed roller pair 7, and the nib W is conveyed by a conveyance roller pair 9 to a registration roller pair 10. Then, the nib W is synchronously conveyed to the image forming section 11 by the roller pair 10, and an image is printed by the image forming section 11. At this time, when the leading end portion of the web W is fed a predetermined length (for example, length of AI, A2, etc.), the web W is cut by a web cutter (not shown), and the leading end portion of the web W is fed a predetermined length. It becomes a cut sheet. Then, the cut sheet is transferred to the fuser 1
5, the image is fixed thereon, and the paper is discharged onto a paper discharge tray 16 by a pair of paper discharge rollers 17.

Further, as another example, a case where a plurality of sheets are stored in parallel in a cassette will be described with reference to FIGS. 3 and 5. Note that the same parts as those described above are given the same reference numerals and the description thereof will be omitted.

The laser beam printer 1a has a cassette 3a that is detachably attached to the body 2, and the cassette 3a is formed to have the same width as the web W. And, the cassette 3a is
Multiple sheets S horizontally and in parallel (for example, one A3 sheet,
It is designed to be able to store two A5 sheets in parallel), and is equipped with a partition plate 19 that partitions the sheets S and can be moved freely and easily fixed.

Then, when the size and position of the sheet S to be stored in the cassette 3m are inputted from an input section (not shown) and image information is transmitted from the external device to the laser beam, the image information is emitted from the laser emitting section to the polygon mirror 12. , is exposed to the image forming section 11 from the mirror 12 through the mirror 13, and a plurality of images are formed on the image forming section 11 in parallel laterally.

At this time, when a plurality of sheets S... are simultaneously fed from the cassette 3a, these sheets S... are simultaneously conveyed to the image forming section 11 by the pair of registration rollers 10.
Images on each sheet S on the image forming section 11 are printed. And these sheets S... are here to stay! The sheets are conveyed to the paper sheet 15, the image is fixed at the same time by the fixing plate 15, and the sheet is discharged to the sheet discharge tray 16.

In this way, by feeding multiple sheets in parallel and performing image formation at the same time, it is possible to reduce the number of wjI image formations, reduce running costs, and extend the service life of the device. can.

(G) As described in detail, according to the present invention, a large-sized web is housed in the body of the machine and the web is fed toward the image forming section by the web feeding means. , large-sized images can be formed on the web, and images ranging from small to large sizes can be easily formed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the inside of an image forming apparatus according to the present invention in detail, and FIG. 2 is a perspective view of the image forming apparatus according to the present invention. 3 and 4 are perspective views showing other embodiments of the present invention. 1 Image forming device, 2... Airframe, 3, 3a,
5...Sheet storage device, 7,9...Web feeding means, 11.Image forming section, S...Sheet,
W. Webb.

Claims (1)

[Scope of Claims] 1. An image forming apparatus including a sheet storage device for storing sheets in a machine body, configured to store a large-sized web in the machine body, and directing the web toward an image forming section. An image forming apparatus characterized in that the image forming apparatus is provided with a web feeding means for feeding the web. 2. The image forming apparatus according to claim 1, wherein the sheet storage device is configured to store a plurality of sheets in parallel and to feed the plurality of sheets simultaneously and in parallel.